Index: source/Plugins/SymbolFile/DWARF/DWARFDIE.cpp
===================================================================
--- source/Plugins/SymbolFile/DWARF/DWARFDIE.cpp
+++ source/Plugins/SymbolFile/DWARF/DWARFDIE.cpp
@@ -185,7 +185,7 @@
 
         if (m_cu)
         {
-            lldb::user_id_t cu_id = ((lldb::user_id_t)m_cu->GetID())<<32;
+            lldb::user_id_t cu_id = m_cu->GetID()&0xffffffff00000000ull;
             assert ((id&0xffffffff00000000ull) == 0 ||
                     (cu_id&0xffffffff00000000ll) == 0 ||
                     (id&0xffffffff00000000ull) == (cu_id&0xffffffff00000000ll));